High Density Liquid Crystalline DNA

High Density Columnar Hexatic Liquid Crystalline DNA

The focal conic liquid crystalline texture demonstrates a beautiful color transition from blue to purple in the fans, which strongly resemble pencil shavings. Differences in thickness of the DNA solution sandwiched between the cover glass and microscope slide are responsible for the color shift. The DNA concentration for this specimen is approximately 350 milligrams per millimeter, and the magnification is approximately 300x. The digital image was recorded on Fujichrome 64T transparency film using a Nikon Optiphot-Pol microscope with crossed polarized illumination. Exposures were recorded about 3 f-steps under the recommended value given by an in-camera photomultiplier and were push-processed about 1.5 f-steps in the first E-6 developer.

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